Analysis of the distances covered and technical actions performed by professional tennis players during official matches

The purpose of this study was to analyse the physical and technical performances of professional tennis players during official matches. The trajectories of eight players were obtained during matches, using an automatic tracking method. The distances covered and technical performances were analysed for the first and second sets. The athletes covered (mean ± standard deviation) a total of 1702.4 ± 448.2 m in the first set, 1457.6 ± 678.1 m in the second set and 3160.0 ± 880.1 in the entire match. No differences were found between the sets for the physical variables (lateral and forward displacements, distance covered per rally, per game and per set, and the percentage of time spent in each range of velocity). However, the distances covered by the athletes during the rallies in which they were serving (median = 5.2; interquartile range (IQR) = 6.7 m) were statistically smaller than when they were returning (median = 6.2; IQR = 7.7 m). Forehand ground stroke proficiency decreased from the first (mean ± standard deviation: 75.2 ± 4.11%) to the second set (mean ± standard deviation = 65.5 ± 14.3%). In conclusion, tennis players did not present reduced physical performance from the first to the second set.     

The immediate-shock deficit and postshock analgesia: Implications for the relationship between the analgesic CR and UR

Rats received a 3-sec, 1-mA footshock either immediately or 3 min after placement in a chamber. Postshock pain sensitivity was assessed with the formalin test. The animals that received the 3-min delay between placement and shock showed an analgesic response compared with noshock controls. The immediate-shock animals did not. Thus the immediate-shock deficit, previously reported for freezing and defecation, also occurs for analgesia. This suggests that shock levels sufficient to condition analgesia are not necessarily sufficient to produce analgesia as an unconditional response. As with freezing, there is a dissociation between conditional and unconditional responses in the fear-conditioning system. Increasing immediate-shock levels to 6 sec, 2 mA produced a transient unconditional analgesia. For analgesia, a conditional response is more readily produced than an unconditional response.     

The social ecology and early parenting of Caucasian adolescent mothers

Social characteristics, maternal behaviors, and the home environments of Caucasian adolescent and nonadolescent mothers were investigated in a sample of 50 primiparous low- and middle-class women and their 4-month-old infants. The mothers were interviewed about their child-care network and about stressful life events that may have occurred since the infant's birth. The HOME inventory was completed and videotapes of 2 hours of home observations were coded to assess maternal proximity, verbalizations, activity, and physical contact with the infant. Interview data indicated that adolescent mothers relied more frequently on other teenagers and other network members for help in child care than nonadolescent mothers. In addition, they also received more frequent support from their mothers and less frequent help from their partner's and partner's mother and siblings than nonadolescent mothers. During the home visit, they were less verbal with their infants and scored significantly lower on the Responsiveness and Maternal Involvement subscales as well as on the total HOME inventory; these results were replicated on subgroups matched for socioeconomic status, emphasizing the unique social context and parenting practices of teenage mothers.     

The mattress makers: emotions and value proposal in Atlético de Madrid

Atlético de Madrid (ATM) Football Club has a single-hearted fan base regardless of the sport results, unlike megaclub’s fandoms (like Real Madrid, from the same city) that demand a steady stream of sporting triumphs. Literature is sparse about how second line clubs that must compete with megaclubs from the same city for a fan base develop a sustainable value proposal based on their fans’ emotions. We analyse the content of interviews with followers, TV-ads and financial statements to deal with ATM’s emotional base comprised of eleven emotions. Emotions like pride secure a fandom base loyal to ATM even in the absence of wins. Findings suggest that ATM’s value proposal (based on fandom satisfaction) focuses on a niche of fierce modern-style supporters with emotions attuned to the club’s performance.     

Public education and student movements: the Chilean rebellion under a neoliberal experiment

Abstract

Chile is recognized in the educational policy field as one of the first laboratories of neoliberal initiatives. These policies, initiated under the dictatorship of Augusto Pinochet, did not change with the new democratic governments after 1990. This characteristic led international organizations to promote the Chilean policies in different contexts in Latin America and beyond. In 2006, a high school student movement occupied public and private schools, demystifying the outcomes of these policies. A new wave of demonstrations took place in 2011, with a college student leadership that paralyzed a significant amount of universities and schools throughout the country. After both waves of mobilizations, the political system opened the process of policy-making that considered the demands of social movements. In this article, we explore the dynamics between educational policies and social student movements in Chile, and the possibilities of change in favor of public education.     

Predictors of Hispanic School Teachers' Self-efficacy in the Pedagogical Uses of Technology

A study to predict teachers' self-efficacy in using technology for pedagogical purposes was conducted in a predominantly Hispanic school district in south Texas; 438 elementary teachers completed a 32-item survey aligned to the National Educational Technology Standards for Teachers. Findings suggested that the instrument is highly reliable in measuring Hispanic school teachers' self-efficacy when they are asked to rate their confidence in their ability to perform technology tasks for educational purposes. An exploratory factor analysis (orthogonal and nonorthogonal) allowed the derivation of composite measures. Three subscales regarding issues of pedagogy composed the dependent variable. Regression analyses (OLS and 2SLS) revealed that two derived composite measures and two contrast variables listed in the general information of the survey strongly predicted the response variable.